Ridge



(No Model.)

' W. M. GOODRIDGE.

' TELEPHONE EXCHANGE SWITCH FASTENER.

Patented Dec. 4; 1888.

, UNITED STATES PATENT OFFICE.

\VILLIAM M. GOODRIDGE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE \VESIERNELECTRIC COMPANY, OF SAME PLACE.

TELEPHONE-EXCHANGE-SWITCH FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 393,824, dated December4, 1888. Application filed October 15, 1888i Serial No. 288,063. (Nomodel.)

To aZZ whom it may concern: My invention is illustrated in the acco1n-Be it known that I, VILLIAM M. GOOD- panying drawings, in which' RIDGE,a citizen of the United States, resid- Figure 1 is a front view of aportion of the ing at Chicago, in the county of Cookand frame or thestile of a switch-board. Fig. 2

State of Illinois, have invented a certain new is a rear view of thesame. Fig. 3 is a sec- -5 5 and useful Improvement in Telephone-EX-tional view upon line a: :r of Figs. 1 and 2. change-Switch Fasteners,(Case 11,) of which Figs. 4 and 5 are different views of the prefthefollowing is a full, clear, concise, and ex erable form of my clamp.Figs. 6 and 7 are act description, reference being had to the front andrear views, respectively, of a por- 1o accompanying drawings, forming apart of tion of astile of aswitch-board provided with thisspecification. a modifiedform of clamp. Fig. 8 is a see- My inventionrelates to holding the strips tional View upon line y y of Figs. 6 and7.

of spring-jack switches upon the switch- Referring to Figs. 1, 2, 3, 4,and 5, it will be boards of telephone-exchanges. observed that the clampconsists of a screw I 5 As-is well known, the spring-jack switches orbolt provided with a head in the form of a are usually made up in stripsof, say, twenty button so arranged that when .the bolt is each. Eachstrip may be twelve inches long turned in one direction the extreme endsof and one-half or three-fourths of an inch thick, the head will comeover the ends of strips 1) each strip consisting of a piece of rubber,c, as shown in Fig. 3. On turning the bolt 20 upon which the contacts ofthe different the head or button is brought in a position spring-j ackswitches are mounted. In Letindicated by the central bolt in Figs. 1 and2, ters Patent No. 357,538, granted Charles E. so as to release thestrips. In the front end Scribner February 8, 1887, is shown such a ofeach bolt is provided a slot, (1, this slot bestrip of spring-jackswitches. In Letters ing parallel with the line passing longitudi- 2 5Patent No. 367,730, granted August 2, 1887, nally through the button.Thus by observto John A. Seely, is shown the manner of ing the directionof the slot (1 at the front of mounting the strips upon the switch-boardthe board the position of the head or button in use prior to myinvention. may be determined and regulated.

It is necessary to provide for readily re- In Figs. 5, 6, and 7 I haveshown bolts 6 f, 0 moving any strip of spring-jack switches placed sideby side, so arranged as to each when desired. clamp the end of a singlestrip. One side of My invention is designed to provide a cheap the headof each screw is filed off, as shown, and convenient clamp for fasteningthe strips so that when turned in one direction the strip to theswitch-board, which may be clamped will be clamped and when turned inthe other 3 5 or unclamped from the front of the board to direction thestrip will be unclaniped. hold or release the strips which are insertedIn Fig. 2 the head or button. of the .lower at the rear of theswitch-board. bolt is provided with a lug or projection on Heretoforethe different strips have been one side only. Clamps of this form areprefsecured by screws inserted from the rear of erably used at the endsof each section of the 40 the board, one screw being inserted throughswitch-board or wherever only one strip of each end of each strip intothe frame of the spring-jack switches is to be clamped. switch-board. Inorder to remove such a strip Having thus described my invention, I ithas been necessary to spread'the wires claim as new and desire to secureby Letters apart and use very long and slim screw- Patent 7 45 dri"ers.l. The combination, with the stile or frame 9 5 By the use of myinvention the clamp is of the switch-board, of strips of spring-jackreadily turned in any desired position from switches mounted thereonfrom the rear and the front of the board to permit of the rea clampinserted from the rear and held in moval of any strip or to clamp anystrip after place by a nut, the head of said bolt being in 50 it hasbeen replaced. the form of a button, as described, whereby IOO thestrips may he held in place or removed upon the frame in the rear bysaid lugs, sub- 10 on turning the bolt, substantially as and forstantially as and for the purpose spec fied. the purpose specified. Inwitness whereof I hereunto Subscribe my 2. The combination, with thebolt provided name this 4th day of June, A. I). 1888. with a headhaving;projecting lugs at one end 1 and at the front end provided with aslot, (7, ILLIAM (YOODRIDGL' in a direetion to indicate the direction ofsaid \Vitnesses: lugs, of the frame of the switch-hoard and the GEORGEP. BARTON, strips of the spring-jack switches secured CHAS. C.\VOODWORTH.

